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<br />The GSE Drainage Design Manual
<br />where 9r"q = required transmissivity for-geocompositeE (m3/sec per nnimpingemenr rare (m/sec); L = hafizintuir"netl,
<br />"f ,16;ldi; and /* st,o
<br />It is generany co*venient to prepare a.tabre that present$ impingement ratransmissivirv and allowable irarismissivity f"; ;;;t" lf the srages,
<br />ffi";H:tJ? #lti,HJ:3Hj,":i;;_ srress reveru ounll 1i:l'rr ;+;:
<br />ihe drainaEe'fu.ru. "l^"u* qr q r.i^L^- _^- ,lug., significantly lower transmiisir
<br />Clnpter 4 -Methods And Concepts
<br />on landfill at a
<br />plau The waste
<br />waste. The slope
<br />on the lanclfill at
<br />the final closure
<br />in place. Often this
<br />the final cover
<br />the value at other
<br />assumed stages
<br />as [Giroud et"
<br />(,4.13)
<br />idth); qi = liquid
<br />angle (degrees).
<br />strsss, required
<br />IIy, higher
<br />of landfill filling
<br />ity is requirecl forthe d rai na ge r av er a r b e it "t a rr ieherlffi :il. J:iiffi iliyAly-*il,'ffi *JTu
<br />" ilf*#l 3 in,il i:**' :, rxilxJ:i#t'*: il,iii
<br />".s" "
<br />r.ver at v a,
<br />'ou
<br />vided in Chapter
<br />landfill stages"rn rerms othicknes' oi tr'* .o,iili;;;iffi ffi ffif "r:Hf .li l#ffi:layer, Equation 4" 13 can b" "d;";;;;;;in the drairrage
<br />k,t^u*= r#
<br />*1.?.* &: requirecl permeability of the drof tne Urainilffi;i. ainage layer (rnlsec); and tn*=
<br />4,2.4 Leakage Detection System
<br />The rmain reason for incru-ding an LDs in a randfi, is to capture and.to
<br />;ffJfi:, fffi jfi
<br />'j;1[:*,,:i,,:t::*y ir,:ir * -:" il ;"'"::h' a sch em
<br />convey liquid:*:::*,i:,:.i:l:*"se of a i,i*uqy ilner. Figure 4.7
<br />ifi'?*J"*:11i9 jh:,f t+'v;;Wffi G::ff;HffiT:,X'Tff fr Xi:
<br />a leak detection
<br />a;-:rf, ,i:rf;ffi $kn'*'"":""#"lla?"'; jiift*ffii'Tf :;fi Tl#:ncon s c, I i d at ion watei,*:,1 : y o&; d;:4 J :il; I l"#?'il HffiLffi(iii) infiltration warer frorn reaki in the rower geomembrane; aqd (iv) riquid
<br />l?ilil1fi lT;:"TnTn'i:"p,:1'$#fiH][#ffi Hffi L[TT,',i iner is present);
<br />d4.14)
<br />mum thickness
<br />of leakage irrto
<br />the LDS; (ii)
<br />Active Opg'ation -gtaeg-l - Model leachate flow {nto the I-CRSIrepresentative point in time in the landfillis ;rF;l"fi;u, phu,,thiskness might be on rhe order or nair J tr,. ii"i'itir^r,*r, ,r.
<br />Tiglt be fairly flat, with an intermediute'cover and fair vesetation.,Active operatio.n graee U - Model leachate fillffi rl,:.iirns u,final grades with an intermediate r;;.;i; prace and fair vesetation.Post.gjqsur* ssaqs - to{oder reachate d; iil';il;;;i;'based
<br />llljlli::';ll:jgd$il IIll* at nnal graces witn J pennan'ent co\,condition is modeted.* HTr,f u, ui*pri ir,* ;;;;t;il"ffinlnnsystem. Since this value is typically very smail vrlhen compa.ectstages, a more complex anatyiii is n6t needed.
<br />Page 4-9
<br />from leakage of
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